Dental device



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iillablt DELVAN W. QUILLNG, OF MINNEAPOLIS, MINNESOTA.

DENTAL DEVICE.

Application filed March 16, 1922. Serial lo. 544,075.

To all fr0/tom, 'it may concern.'

Be it known that I, DnLvAN W. QUILLING,

a citizen of the United States, residing at the cheeks and tongue ofthel patient.` l

accomplishv the objects of my invention by providing forceps havingcooperating grooves in the tips thereof for holding a. sprue. 'lhere arepreferably two sets of these grooves, one set being, at a right angle tothe length of the forceps, and the other set being at an obtuse angle.The sprue which is held in one or the other of these sets of grooves isthereby positioned so that it can readily reach any surface of anytooth. A tube for delivering a cooling jet is so positioned that thecooling medium will be directed upon the sprue for chilling the same.The nozzle of the tube carrying the cooling medium is preferably sopositioned that the thickest part of the sprue which is, of course, thepart carrying the most heat, is chilled first, thereby eliminatingflaking at the place where the inlay model is engaged by the sprue.

'lhe full objects and advantages of my4 invention will `appear in`connection with the detailed description, and the novel featuresembodied in my inventive idea will be particularly pointed out in theclaims.

ln the accompanying drawings, Fig. l is a side elevational view of thedevice. Fig. 2 is a similar view with portions broken away and showing`the manner in which a sprne is used. Fig. 3 is a top plan view. Fig. ilis a fragmentary view corresponding to Fig. 2 but showing the sprue heldat a different angle.

Referring to the construction shown 1n the drawings, the numerals l0 andl2 designate the two members of forceps which are connected to eachother at the ends 14C adj as cent springlilre portions 416 and 18 asshown in Fig. A pin 2O secured to one of the members is received in a.hole in the other member in order that the two members may be keptproperly positioned relatively to each other. The tips of the forcepsare provided with two sets of grooves 22 and 24, the first set beingright angularly disposed and the other set being disposed.r at an obtuseangle, whereby a sprue 26 may be held either in the position shown in Fig. 2 or in the position shown in Fig. 4. 'A syringe is associated withthe forceps preferably in the following manner. A tube 28 is solderedalong one of the members, asv the member 12, and this tube has a nozzle30 positioned so as to deliver cooling medium such as water directly tothe sprue 26 when the latter' after having been heated is pushed into awax modell/V which is in the .cavity of a tooth T. The other end of thetube 28 is connected by a flexible tubing 32 with a. bulb 34; forforcing out the water.

The operation and advantages of my invention will now be apparent.` Theinstrument is held in one hand and after the pointed end of the spruehas been pushed into the wax model contained in the tooth cavity, wateris applied to the sprue with the bulb held in the same hand, therebychilling the sprue and ifridly fixing it to the wax model. Theinstrument also holds the sprue in the correct position for heating aswell as in correct position for removal of the wax model from the tooth.The wax model can be removed from the tooth and carried to the base forinvestment without changing the grip on the forceps or removal of thehand from the :forceps until the 'wax model is firmly set forinvestment. During the entire operation, one hand of the operator isleft free for duties furthering the convenience of the operation. Shouldthe op erator desire to further burnish the wax model, it can be left inthe tooth cavity with the sprue attached. At the ydesired time, theforceps can again be applied to the sprue and by pressure on the bulb,the entire margins of the model can be chilled and the model thenremoved. lf further trial is desirable, the model can again be carriedto the tooth cavity and the same procedure carried out. T he advantagesresulting from the use of my appliance may be summarized as -follows zl. llt eliminates the necessity of an asn sistant.

lt holds the sprue for heating.

Il. lt carries this sprue to correct pcsition. n i

4l. lt chills the sprue at the point of most heat first, thereby fixingthe sprue to the model Without flaling.

5. lt permits removal of the model Without changing the grip of thehand.

G. The modelv can be carried to thelbase for mounting without change ofgrip.

7. The model can be replaced in the cavity for further burnishing ifdesired.

8. The model can then be" completely chilled before removing by furtherpressure on the bulb.l

v9. lt leaves one hand free duringthe entire procedure for holdingeither the tongue or cheeks or a mouth inirror.

l0. It eliminates danger of fracturing the margins of the Wax model.

l claim:

l. A dental appliance comprisingv a holder having provision for holdinga sprue` at dif ferenty angles,A and means carried byy 'said holder fordirecting a cooling jetupon said sprue.

2. A dental appliance comprising a holder for holding a sprue, and meanscarried by said holder in such position as to direct a cooling jet uponthe thickest portion of said sprue.

3. A dental appliance comprising forceps for holding a sprue, and meanscarried by said forceps for directing a cooling jet upon said sprue.

4. A dental appliance comprising forceps for holding ak sprue and a tubecarried by saidV forceps, said tube having a nozzle for directing acooling jet upon said sprue.

5. A dentalV appliance comprising forceps having grooves in the freeendsthereof for.

7 A dental appliance comprising forceps.

for holding a sprue, a tube secured t one of the members of saidforceps2 said tube having anozzle for directing a cooling jet upon thesprue, and a bulb connected With said tube.

In testimony whereof I hereunto ailix my signature.

DELVAN lV. QUILLING.

